I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.

I taste better than I can smell. Who am I?

When we see 2 but call 10?